Alstom 500 MW exciter bearing failure
Early identification of white metal bearing failure allowed machine to be brought off in a controlled manner so reducing risk of damage to rotor journal and extended outage.

Generator rotor off-set balance
The development of a large vibration thermal due to inter-turn faults resulted in the machine not being able to achive full load. Off-set in-situ balancing allowed machine to be fully flexible until available outage.